Fluid-pressure-operated valve



April 23, 1929. -r I 1,710,054

FLUID PRESSURE OPERATED VALVE Filed Feb. 17, 1927 Patented Apr, 215,i929.

eerie PATRICK M. GRANT, or onion-so, limiters.

FLUID-PBESSURE-OIEERATZQ1D VALVE.

Application February 17, 1927. Serial Ho, 165,876.

stance, by the timid pressure maintained in the trai 11 line.

Another ()lJJCCil oil the invention 15 to provide means tor all ustingthe valve control elements to enable the proper posit z rious parts in amanner to facilitate the as sembling of the device, and to obtain themash mum of el'liciency.

Another object of the invention is to provide, in combination with otherfeatures, an adjustable stop for limiting the movement ot the valvecontrolling elements in order to maintain the proper relation of partsand insure the ellectual operation of the device.

Another object or the invention is to provide means whereby, if desired,an additional supply at fluid pressure may be maintained for actuating aWhistle or the like.

A further object of the invention is to provide a novel construction andz'rrrangement of fluid pressure retaining means tor obtaining themaximum efiiciency in the operation or? the device. I

A still firth-Q1 object of the invention is to provide suitable meansfor eitlectually. actiu ating the fluid pressure retaining means.

One embodiment of the invention is shown, for illustrative purposes, iiithe. accompanying drawing which represents a longitudinal sectionalelevation through the devices illustrates diagrammatically,supplemental. or auxiliary means for containing additional fluidpressure to be used in the operation elf the valve and Whistle or othersignal; device.

Referring to the drawing, the illustrative embodiment oi. the inventionshown comprises a housing; 5 adapted to be positioned in the cab ot alocomotive or the like, said housing having a longitudinal bore (3 atvarious diametors formed therein and having; its opposite ends screwthreaded to receive the plus; 7 and cap 8, respectively the plug 7 beingprovided. with an aperture 9 having'intcrnal screw threads adapted toreceive a solid plug 10 for purposes hereinafter described.

Mounted to slide longitudinally in the bore "ring of va and p 6 are apair of preferably different sized pistons l1 and '12 mounted on, andconnected to gether by a rod 13 having ts opposite ends screw threadedto receive the plates i l and jam nuts'li? for securing the gaskets 16inproper position. The piston shownis ot' the type covered by my PatentNo. 1,414,403 issued May 2, 1922, the pistons herein shoivn havinggaskets adapted to ellectually resist the passage of tiuid pressure ineither direction. he position 0 t the pistons 11 and 12 in the bore (3terms, in elect, partition walls extending transversely of the bore andprovides chambers 17, 18 and 19 Within the housing- 5, which is alsoprovided With communicating passages or ports 20 and EZl'torconnect-inc; the chambers 17 and 18, and Witha passage 9;? forconnecting the chambers 18 and 19. The housing 5 is also provided withan inlet port 23 and out-let port 24c, the former communicating with thechamber 17 and being connected by means of a pipe 253 with the trainline of an a r b eke system or the like in which a supply of fluidpressure is maintained for operating the braking mechanism, while theport 241 communicates with'the chamber 19 and is adapted to valve seatsof suitable or corresponding di mensions formed in. the housl g. Thevalve stems of the valves 27 and 28 a re adapted to be slidabl received.by sockets termed in adjacent valvesin nested relationship with respectto each other, while the stem the valve 29 is slidably positioned in asocket 3O termed in. a screw plus 31, screw threaded into the housing 5and forming a closure tor a portion or the passage 20 and a primary ormain valve v guide tor the nested valves 2'4, 28 and 29.

ltnterposeiil between the valves 27328 and a members are arate thevarious snun lv on their re 29 and their respective n springs 53?;tending" to valves ind position them spective valve seats.

be connected by means ot a pipe '26 to a Whistle or other suitablesignalling de- It \villbe observed that by such a construction ofpressure rctaining means, the possible escape 01 back pressure ispractically eliminated by reason of the plurality 0t pressure retainingele:

ments and provides a neatand compact arrangement capable of quickassembling and insuring maximum efiiciency in the operation of thevalve.

In the operation otthe device as thus far described, the fluid underpressure from the train line enters the chamber 17 through the pipe andopens the valves 27, 28 and 29, thereby permitting the fluid to passthrougl the ports 20 and 21 into the chamber 18, and thence through, thepassageor port 22 into the chamber 19 until the maximum pressure of Ithe train line is uniformly distributed in the various chambers,afterwhich the pressure retaining means will close to prevent the escapeof any back pressure bers 18 and 19 into the chamber 17, it beingunderstood, of course, that the pressure of the train line upon enteringthe chamber 17 will have forced the piston 12 against the stop 33 formedon the housing, and the piston 11 have moved past the port in a mannerto close the port and prevent the escape otfluir pressure from thechambers 18 and 19 into the pipe 26. So long as the pressure in thetrainline is maintained the pistons 11 and 12 will remain in the positionsshown in the drawing, but, if for any reason, the train line is bled orthe pressure therein reduced, for example,

1 in the case of a break in the line due'to part posite direction by ingof the train. or the giving of a rope sigi i V o nal by a member of thetrain crew, tnereby reducing the pressure in the chamber 17, the

maximum train pressure retained "Within the chambers 18 and 19, byreason of the closing. of the valves 27, 28 and 29, will force thepistons longitudinally of the bore in a manner to uncover the port 24:and permit the fluid pres sure Within the chambers 18 and 19 to passthrough the said port into the pipe 28 and thence to the Whistle orother signalling de vice, thereby Warning the engineer of the train, orother operator. ofabnormal condi tions in the system. After thecondition has been corrected, and suitable operating pressure restoredin the train line the pressure upon entering the chamber 17 will forcethe pistons longitudinally of the bore in the opreason of the thenreduced pressurein the chambers 18 and 19 and cause the piston 11 tocover the port in the drawing, atterwhich the pressure in thechamber 17will pass the pressure'retaingine means and into thechambers 18 and 19until uniform pressure is obtained in all the chambers and the pistonswill remain a position to cover the is again 'bled duced.

To limitthe movement of the pistons in one direction and to insureunobstructedpasin port 24 until the line from the cham= fluid is desiredfor shiftn Val ve of m axi mum 241 as shown V advantage in variouslytions and sub eombinations.

or the pressure therein re sage oi the train line prey; ber 17 andthence to the uni; the plug 8 is provided with stop 34 adapted to hescrew th and positioned in manner to the end the rod 13 when reached apredetermined po be such as to prevent the i I. 12 tram coverinp theport 23 and the opening" connec the chamber 17 with the passage 20. 3%may be provided Wit curely locking the stop ad ii The housing 5 may beprovince l yucthe passage 20 with a screw threaded port 3-8 shown in thepresent instanc as closed by a l g 3?. In such an arm: rent and \vih heplug 10 positioned i I a"erture 9 0. he plugf the fluid pr ssure in i i8 and 19 will be relied upon the t ongitud n lly ot the horse and to leor othe I Walling device trio pressi; e in the tra n nne reduced. 21 theevent that an additiona n, which will i actuating the signalli r a suresupply recept, u grammatically in dot L lines) mav ployed and connectedwith the ohainhe andli) by means of pipes 39 a "esnec tively, the pipe39 beinh' inserted in the hort- 36 after the removal of the plug 3? andthe pipe 40 screw threadeo 11" apertured plug 7 after removing the ItWill be noted that by such an arrangement the pressure of the trainline. in addition to filling the ehan'ibers 18 an 19, will store up anadditional or auxilia supplv of'fluid pressure in the receptacle ther '7providing an addi ional supplv tor prolo i ing the actuation of thesignaling device.

From the foregoing specification it will be observed that my inventionprovides an en tirely automatic fluid pressure controlled etiiciency,capahle of beinu' easily assembl d and providing suitable adjustingmeans for accurately phsitionins; the various elements to obtain themost efiicient results. I l 7 Obviously, the present invention is notlimited tot-he precise construction and ar- 1 I rangement shown anddescribed, as the same may be variously modified without oeparti 5; fromthe spirit and scope of the invention set forth in the appended claims.h'loreover all the features of the invention nee i used conjointly, asthe same may be used to different c lVhat I claim'as my invention anddesire to secure by Letters Patent is: 1. A pressure operate-d valvecomprising a housing having a longitudinal bore formed therein andhaving passa es and i outlet ports communicatn g means for'closing theends ct rality of members mounted in said bore and adapted to form aplurality of communicatinnchambers in said housing, means for adescapeof fluid from certain oi? said chambers to the other or": saidchambers,said members being; movable in said bore for permitting the escape offluid from certain of said chambers through said outlet port upon thereduction oi? pressure in ccrtainruher oit said chambers.

52. A pressure operated valve comprising a housing" having alongitudinal bore formed therein. and having passages and inlet andoutlet ports comnumicating with said here, means for closing the ends ofsaid bore, a plurality of members mounted. in said bore and adapted toform a plurality of chambers in said housing, means for admitting tiuidunder pressure to said passage and chambers, means for preventing theescape of tluidfrom certain of said chambers to the other or saidchambers, said members being movable in said bore permitting the escapeoil fluid. from. certain of said chambers through said outlet portuponthe reduction or pressure in certain other of said chambers, andadjustable means tor limiting the movement of said members. i

3. A pressure operated valve comprising a housing having a longitudinalbore, passages and inlet and outlet ports. formed therein, means forclosing the ends of said bore, plurality of members mounted in said boreand adapted to form a plurality of connnunieating chambers in saidhousing, means for admitting fluid pressure to said passages andchambers, and means for preventing the escape of back pressure fromcertain of said chambers, said members being movable in said here forpermitting the escape of pres sure from certain of: saidchambers throughsaid outlet port upon the reduction of fluid pressure in certain otherof said chambers.

it. A pressure operated valvecomprising a housing having a connminicatinr, longitudr al bore, passages and outlet port formed therein, means forclosing the ends oil said here, a plurality of connected members mountedin said bore and adapted to orm a plurality of connnunieatingchambers insaid housing, one of said members being adapted normally to cove saidport, means for adiuitting fluid under pressure to said chambers andpassages and means for iii-eventing; the escape of back pressure fromcertain'ot said chambers, said members being movable in said bore forcovering and uncovering said port according to the relative degree oipressure in the respective chambers.

5. A pressure operated valve comprising a housing having a. longitudinalbore, passages and an outlet port foru'ied therein, means for closingthe ends oi said bore, a plurality oi members mormtcd in said bore andadapted housin to form a plurality oi communicating chambers in saidhousing, means for admitting fluid under pressure to said chambers, aplu rality of pressure retaining means for preventing the es ape of backpressure from certain of said chambers, said members being" 'n'rmx'ablein said. bore for p rmitting the es cape otpressure through said outletport from certain oi said chambers upon the reduction of fluid prcs-sure in certain other of said chambers, and adjustable means ior limitingthe movement of said members.

6. A, pressure operated valve comprising a i having a cemmunicati11;;bore, pas-= and outlet port formed therein, means for closing the endsof said bore, a plurality of members mounted in. said bore in a mannerto form a plurality ol communicating chambers'in said housing, one oisaid mem bers being adapted noru'lally to cover said port, means foradjusting said port covering member with respect to said port, means foradmitting'tluid under pressure to said cnam hers, a plurality of alignedpressure retaining means interposed between certain ol said chambers,said members being movable in said bore to permit the escape of illuidpressure through said outlet port from certain of said chambers upon thereduction of pressure in certain other of said chambers, and means forlimiting the movement of said members.

7. A pressure operated valve comprising' a housing having acommunicuting bore, passages and outlet port formed therein, means forclosing;' the ends of said bore, a. plurality oil connected membersmounted in said bore in a manner to form a plurality cl. conun'unicatingchamers in said housing, one of said members being adapted normally tocover said port, means for admitting fluid under pressure'to saidchambers, a plurality of nested pressure retainingvalves interposedbetween certain of saidchambers, resilient means tending to separate andseat said valves, said members being movable in said bore to permit theescape or fluid pressure through said outlet port "from certain of saidchambers upon the reduction of pressure in certain otl' ;r of saidchambers, and adjust able means for limiting the movement of saidmen'ibers.

8. A pressure operatedvalvc comprising a housing having a longitudinal.bore formed therein and provided with inlet and outlet portsconnnunicating with said bore, closures positioned in the ends oil? saidhere, one of said c osiu'es having an aperture therein, a plurality oipistons mounted in said here in a mannor to term a iluralitv of chambersin the housing, said housing having); passages or ports connecting; saidclmmbers, said pistons hem connected t u etber and ad ustable Withrespect to each other. one ot sa1d pistons be- 111 adaoted normall tocover said outlet 2: l p

port and capable of being adjusted with respect thereto, means foradmitting fluid under pressure to said chambers through said inlet port,a plurality of nested and aligned pressure retaining values interposedbetween certain of said Cllzlil'll @1's said pistons being movable insaid bore for covering and uncorcring said outlet port according to therelative degreew'it' pressure in the respective chambers and means forlimiting the moremeut of Said pistons. i l

9. A pressure operated valve comprising,

in combination, a housing having a longitudinal bore and an outlet portconununicatmg therewith, means for closing the ends of said relativedegree of pressure in the respective chambers.

10. A pressure operated Valve comprising, in combination a housinghaving a longitudinal bore and an outlet port communicatin g therewith,means for closing the ends of said bore, -a plurality of connectedmembers mounted in said bore and adapted to form a plurality of chambersin said housing, said housing having a plurality of passages formedtherein and communicating with said chambers, a fluid pressure supplyreceptacle communicating with said passages and cham bers, means foradmitting fluid under pressure through said passages to said chambers,and a check Valve positioned in one of said passages for preventing theescape of back pressure from certain of said chambers to other chambers,said members being movable in said bore for covering and uncovering saidoutlet port according to the relative degree of pressure in therespective chambers.

l n testiinony whereof I have signed my name to this specification onthis 31st day of January A. D. 1927.

PATRICK M. GRANT.

